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common name of the largest North American frog, Rana catesbeiana. Native to the E United States, this species has been successfully introduced in the West and in other parts of the world. The body length is 4 to 8 in. (10–20 cm), and the legs may be up to 10 in. (25 cm) long. An aquatic form with fully webbed toes, the bullfrog can close its nostrils and lie at the bottom of a pond for some time. Males have a loud, booming call. Bullfrog tadpoles require two or three years to become adults. The bullfrog is the only frog whose legs are marketed in quantity for food in the United States. Several other large frogs of the genus Rana are called bullfrogs in other regions. Bullfrogs are classified in the phylum ChordataChordata
, phylum of animals having a notochord, or dorsal stiffening rod, as the chief internal skeletal support at some stage of their development. Most chordates are vertebrates (animals with backbones), but the phylum also includes some small marine invertebrate animals.
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, subphylum Vertebrata, class Amphibia, order Anura, family Ranidae.



(Rana catesbiana), one of the largest representatives of the genus Rana of the family Ranidae. Length, up to 20 cm; weight, up to 600 g. The back is olive brown with indistinct dark brown spots.

The bullfrog is widely distributed in North America, where it lives in thickets along rivers. It feeds on invertebrates, small fish, frogs, and small mammals; it preys on the nestlings of domesticated ducks. The males make a bellowing noise that sounds like a bull (hence the name). The tadpoles develop for two years. Bullfrogs have commercial value as food and are bred on farms. They have been introduced into some South American countries and Japan.


(mining engineering)


any of various large frogs, such as Rana catesbeiana (American bullfrog), having a loud deep croak
References in periodicals archive ?
The training involves a non-lethal integrated pest management system that prevents the entry of the bullfrogs into the hectares of catfish farms in the area, located around one and a half hours from the city's downtown.
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The fish-free American Bullfrog ponds in our study were typically large, permanent ponds set in a diverse terrestrial landscape that included field, forest and edge habitats that would be inhabited by a wide variety of pond-breeding amphibians that would use the pond.
From Miami to Malibu and everywhere in between, triathletes and anyone who loves the outdoors will discover that BullFrog was created for ultimate performance and protection," said SSCR EVP and acting CEO Tom Nestor.
At Rana Ranch we grow healthy, hardy laboratory grade bullfrogs year-round with no adverse effects on wild bullfrog populations.
75%) in the bullfrog tadpoles examined, this study shows that invasive bullfrogs, a known reservoir of chytridiomycosis, are also a likely carrier of ranaviral disease in Europe.
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The company said that it has purchased use from Bullfrog Power for all of its 64 facilities in Nova Scotia, New Brunswick and Prince Edward Island.